WO2023273881A1

WO2023273881A1 - Driving method for liquid crystal display, electronic device, and driver chip

Info

Publication number: WO2023273881A1
Application number: PCT/CN2022/098827
Authority: WO
Inventors: 林明田; 周伟彪
Original assignee: 腾讯科技（深圳）有限公司
Priority date: 2021-06-29
Filing date: 2022-06-15
Publication date: 2023-01-05
Also published as: CN113470588B; US20230252949A1; CN113470588A; EP4293655A1

Abstract

A driving method for a liquid crystal display (LCD), a display apparatus comprising an LCD, an electronic device (320, 2100), a driver chip (2030), and a storage medium, relating to the technical field of liquid crystal display. The driving method comprises: determining driving voltages of pixel units in multiple screen regions of an LCD (321, 2101) on the basis of an image frame to be displayed (S801); for any one screen region of the multiple screen regions, outputting a first driving signal to the pixel units in the screen region on the basis of the determined driving voltages, the first driving signal being used for controlling liquid crystal molecules corresponding to the pixel units in the screen region to flip under the driving voltages (S802); and in response to the completion of outputting the first driving signal to the pixel units in the screen region and reaching a target duration, outputting a second driving signal to a backlight source (402) of the LCD (321, 2101), the second driving signal being used for controlling to light up part of a light source corresponding to the screen region (S803).

Description

Driving method, electronic device and driving chip of liquid crystal display

This application claims the priority of a Chinese patent application with application number 202110726304.6 and titled "Drive method, electronic device and drive chip for liquid crystal display" filed with China Patent Office on June 29, 2021, the entire contents of which are incorporated by reference in this application.

technical field

The present application relates to the technical field of liquid crystal display, and in particular to a driving method of a liquid crystal display, a display device with a liquid crystal display, electronic equipment, a driving chip and a storage medium.

Background technique

With the development of VR (Virtual Reality, virtual reality) technology, many VR devices, such as VR helmets and VR glasses, have appeared. In VR helmets or VR glasses, VR images are generally displayed through TFT LCD (Thin Film Transistor Liquid Crystal Display, Thin Film Transistor Liquid Crystal Display).

The display module of TFT LCD includes: light guide plate, lower polarizer, thin film transistor, liquid crystal layer, color filter plate and upper polarizer. TFT LCD uses a light guide plate to realize backlighting. After the backlight source is turned on, the light will be transmitted through the light guide plate and diffused into the display area of the display screen. Therefore, the entire display screen is either completely lit or completely extinguished. In order to avoid VR image display errors, it is necessary to turn on the backlight after the data in the entire display area is completely written and the liquid crystal layer is completely flipped.

In the above process, since the writing speed of the ITO (Indium Tin Oxides, indium tin oxide) capacitive switching signal of the liquid crystal layer in the TFT LCD is limited by the ITO line width, that is, the refresh rate of the TFT LCD is limited, here Under normal circumstances, in order to reserve enough flipping time for the liquid crystal molecules in the liquid crystal layer, the time for writing data will inevitably be shortened, and the resolution of TFT LCD is limited. The method of improving the resolution under the premise of high efficiency.

Contents of the invention

Embodiments of the present application provide a method for driving a liquid crystal display, a display device with a liquid crystal display, electronic equipment, a driving chip, and a storage medium, which can improve the LCD resolution without compromising the refresh rate of the LCD. The technical solution is as follows:

In one aspect, a method for driving a liquid crystal display is provided, executed by a controller of a liquid crystal display (LCD), the method comprising:

determining driving voltages of pixel units in a plurality of screen areas of the LCD based on an image frame to be displayed;

For any screen area among the plurality of screen areas, based on the determined drive voltage, a first drive signal is output to the pixel units in the screen area, and the first drive signal is used to control the The liquid crystal molecules corresponding to the pixel units are flipped under the driving voltage;

In response to the completion of outputting the first drive signal to the pixel units in the screen area and reaching the target duration, a second drive signal is output to the backlight source of the LCD, and the second drive signal is used to control the pixel unit corresponding to the screen area. Part of the light source lights up.

In one aspect, a display device with a liquid crystal display is provided, the device comprising: a display module of a liquid crystal display (LCD), a miniature light-emitting diode (Mini LED) backlight module of the LCD, and a display module of the LCD A driver chip, wherein the display module includes liquid crystal molecules, the Mini LED backlight module includes red, green and blue (RGB) Mini LEDs, and the RGB Mini LEDs are used to provide backlight sources to the display module;

The driving chip is used to: determine the driving voltage of the pixel units in the multiple screen areas of the LCD based on the image frame to be displayed; for any screen area in the multiple screen areas, based on the determined driving voltage , outputting a first driving signal to the pixel units in the screen area, the first driving signal is used to control the liquid crystal molecules corresponding to the pixel units in the screen area to flip under the driving voltage; The pixel units in the screen area output the first driving signal and reach the target duration, and output the second driving signal to the Mini LED backlight module, and the second driving signal is used to control the corresponding part of the screen area The light source turns on.

In one aspect, a driving device for a liquid crystal display is provided, the device comprising:

A determining module, configured to determine the driving voltages of the pixel units in multiple screen areas of the LCD based on the image frame to be displayed;

The first output module is configured to output a first driving signal to pixel units in the screen area based on the determined driving voltage for any screen area among the plurality of screen areas, and the first driving signal is used for controlling the liquid crystal molecules corresponding to the pixel units in the screen area to flip under the driving voltage;

The second output module is configured to output a second driving signal to the backlight light source of the LCD in response to the completion of outputting the first driving signal to the pixel units in the screen area and reaching the target duration, and the second driving signal is used for Controlling the part of the light sources corresponding to the screen area to turn on.

In one aspect, an electronic device is provided, the electronic device includes a liquid crystal display (LCD), one or more controllers of the LCD, and one or more memories, the one or more memories store at least A computer program, the at least one computer program is loaded and executed by the one or more controllers to realize the above-mentioned driving method of the liquid crystal display.

In one aspect, a driver chip for a liquid crystal display is provided, the driver chip includes one or more controllers and one or more memories, and at least one computer program is stored in the one or more memories, the At least one computer program is loaded and executed by the one or more controllers to realize the above-mentioned driving method of the liquid crystal display.

In one aspect, a computer-readable storage medium is provided, and at least one computer program is stored in the storage medium, and the at least one computer program is loaded and executed by a processor to realize the driving method of the above-mentioned liquid crystal display.

In one aspect, a computer program product or computer program is provided, the computer program product or the computer program comprising one or more pieces of program code stored in a computer-readable storage medium. One or more controllers of a liquid crystal display (LCD) in an electronic device can read the one or more program codes from a computer-readable storage medium, and the one or more controllers execute the one or more programs The program code enables the electronic device to execute the above method for driving the liquid crystal display.

The beneficial effects brought by the technical solutions provided by the embodiments of the present application at least include:

By dividing the LCD into multiple screen areas, and outputting the first driving signal to each pixel unit in each screen area, after the liquid crystal molecules in this screen area are controlled to flip, there is no need to wait for the liquid crystal molecules in other screen areas to flip. , but directly output the second drive signal to the backlight light source to control the lighting of some light sources corresponding to the screen area, thereby saving the waiting time of each screen area in the LCD during the backlighting process, and the saved waiting time can be Controllers for LCDs accept larger amounts of data to be written, thereby greatly increasing LCD resolution without compromising the LCD refresh rate.

Brief description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is a schematic diagram of a display module of a side-entry TFT LCD provided by an embodiment of the present application;

Fig. 2 is the schematic diagram of the driving mode of a kind of TFT LCD that the embodiment of the present application provides;

FIG. 3 is a schematic diagram of an implementation environment of a method for driving a liquid crystal display provided in an embodiment of the present application;

FIG. 4 is a schematic diagram of the structure of a TFT LCD based on a Mini LED backlight source provided by the embodiment of the present application;

FIG. 5 is a schematic diagram of an application scenario of a liquid crystal display driving method provided in an embodiment of the present application;

FIG. 6 is a schematic diagram of a stacked structure of a TFT LCD based on a Mini LED backlight source provided by an embodiment of the present application;

Fig. 7 is a comparative schematic diagram of a backlight lighting method provided by the embodiment of the present application;

FIG. 8 is a flowchart of a method for driving a liquid crystal display provided in an embodiment of the present application;

FIG. 9 is an interactive flowchart of a method for driving a liquid crystal display provided in an embodiment of the present application;

FIG. 10 is a schematic diagram of a partitioning method of an LCD provided in an embodiment of the present application;

FIG. 11 is a logical schematic diagram of a backlight circuit provided by an embodiment of the present application;

FIG. 12 is a schematic diagram of the principle of an LCD partitioning method provided by an embodiment of the present application;

FIG. 13 is a logical schematic diagram of a backlight circuit provided by an embodiment of the present application;

FIG. 14 is a principle comparison diagram of an LCD driving method provided by an embodiment of the present application;

FIG. 15 is a schematic diagram of a display effect of an LCD driving method provided in an embodiment of the present application;

FIG. 16 is a schematic diagram of the principle of an LCD driving method provided by an embodiment of the present application;

FIG. 17 is another schematic diagram of the driving mode of an LCD provided in the embodiment of the present application;

Fig. 18 is a schematic diagram of a Mini LED backlight panel provided by the embodiment of the present application;

FIG. 19 is a schematic structural diagram of a driving device for a liquid crystal display provided in an embodiment of the present application;

Fig. 20 is a schematic structural diagram of an electronic device provided by an embodiment of the present application;

FIG. 21 is another schematic structural diagram of an electronic device provided by an embodiment of the present application.

detailed description

In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

In this application, the terms "first" and "second" are used to distinguish the same or similar items with basically the same function and function. It should be understood that "first", "second" and "nth" There are no logical or timing dependencies, nor are there restrictions on quantity or order of execution.

In the present application, the term "at least one" means one or more, and the meaning of "multiple" means two or more, for example, a plurality of first positions means two or more first positions.

Below, the terms involved in the embodiments of the present application are explained:

Liquid Crystal Display (LCD): Also known as a liquid crystal display, it is a type of flat-panel display. LCD is used for the screen display of electronic equipment such as televisions, computers, digital clocks and watches, and has the advantages of low power consumption, small size and low radiation. LCD uses a liquid crystal solution in two polarized materials. When current passes through the liquid crystal solution, the liquid crystal molecules will be rearranged to achieve the purpose of imaging. Among them, the liquid crystal molecules will exhibit different optical characteristics under the action of different voltages. LCD driving methods can be divided into three types: static (Static) driving, simple matrix (Simple Matrix, also known as passive matrix) driving and active matrix (Active Matrix, also known as active matrix) driving.

Thin Film Transistor Liquid Crystal Display (TFT LCD): TFT LCD is a type of active matrix type liquid crystal display (AM-LCD), and TFT is the abbreviation of Thin Film Transistor (Thin Film Transistor). Since LCD needs voltage control to generate grayscale, the LCD that uses TFT to generate voltage to control the flip angle of liquid crystal molecules is called TFT LCD. That is to say, each pixel unit (i.e. liquid crystal pixel) on the TFT LCD is driven by a TFT integrated behind the pixel. TFT LCD has the advantages of high responsiveness, high brightness, and high contrast. The display module of TFT LCD includes: light guide plate, lower polarizer, thin film transistor TFT, liquid crystal layer, color filter plate and upper polarizer. The flip angle of liquid crystal molecules is controlled by changing the signal and voltage applied to TFT, so as to Control the output of polarized light from each pixel to achieve the purpose of display.

Active Matrix Organic Light Emitting Diode (Active Matrix Organic Light Emitting Diode, AMOLED): also known as Active Matrix Organic Light Emitting Diode, AMOLED is a display technology, among them, OLED (Organic Light Emitting Diode, organic light emitting diode Polar body) describes the type of thin film display technology as organic electroluminescent display, while AM describes the driving method of LCD.

Micro Light Emitting Diode (Micro LED): Micro LED display technology refers to a display technology that uses self-luminous micron-scale LEDs as light-emitting pixel units and assembles them on the drive panel to form a high-density LED array. Due to the characteristics of small chip size, high integration and self-illumination, micro LED has great advantages in terms of brightness, resolution, contrast, energy consumption, service life, response speed and thermal stability compared with LCD and OLED in terms of display. big advantage.

Virtual reality (Virtual Reality, VR) technology: also known as spiritual technology, is a new practical technology developed in the 20th century. The so-called virtual reality, as the name suggests, is the combination of virtual and reality. VR technology includes computer, electronic information, and simulation technology. In theory, VR technology is a computer simulation system that can create and experience a virtual world. It uses a computer to generate a simulated environment and immerses users in the environment. VR technology is to use the data in real life, through the electronic signal generated by computer technology, combine it with various output devices to transform it into a phenomenon that people can feel. These phenomena can be real objects in reality. It can also be a substance that we cannot see with the naked eye, and it can be represented by a three-dimensional model. Because these phenomena are not what we can see directly, but the real world simulated by computer technology, it is called virtual reality.

Screen door effect: The screen door effect is the thin line dancing caused by real-time rendering and the separation flickering of high-contrast edges in the case of insufficient pixels. In the field of VR, it refers to the phenomenon that due to the insufficient resolution of the VR device (screen and content), the human eyes will directly see the pixels of the display screen, as if looking at things through a screen window.

With the continuous development of social productivity and science and technology, the demand for VR technology in all walks of life is increasingly strong. VR technology has also made great progress and has gradually become a new field of science and technology. VR technology has been recognized by more and more people. Users can experience the most authentic feelings in the VR world. The authenticity of the simulated environment is difficult to distinguish from the real world, making people feel like they are on the scene; at the same time , VR has all the perception functions that human beings have, such as hearing, vision, touch, taste, smell and other perception systems; finally, it has a super simulation system, which truly realizes human-computer interaction, so that people can Feel free to operate and get the most realistic feedback from the environment. It is the existence, multi-perception, and interactivity of VR technology that makes it loved by many people.

The realization of VR technology depends on VR devices, which refer to hardware devices that support VR technology, including VR helmets and VR glasses. After years of development and in-depth research, in order to continuously improve the experience of using VR equipment, how to improve the overall machine to a greater extent in terms of ergonomics, display effects, and richness of interaction has always been the focus of the VR industry. The part that continues to pay attention and work hard. In terms of improving the display effect, technicians have been trying to improve the display effect indicators such as resolution, refresh rate, and brightness range to achieve a better display experience. However, limited by the current screen production process, under the traditional display structure, indicators such as resolution and refresh rate are already close to a critical value in an equilibrium state.

VR devices at this stage are commonly used: TFT LCD, AMOLED, Micro LED and other display solutions. Because Micro LED is based on the semiconductor production process, it has a very obvious advantage in resolution, but because of its high price, its application has been difficult to popularize. With the popularization of mobile phone applications, AMOLED display has greatly reduced its production convenience and manufacturing cost, but because it is difficult to realize its pixel arrangement in real RGB (red, green and blue) arrangement, its display The degree of delicacy is not high, and there is a more obvious screen window effect. However, TFT LCD has gradually become the mainstream display solution for VR devices due to its large cost advantage, mature technology, and true RGB pixel arrangement. Refresh rate and brightness range cannot all achieve high parameter specifications, and it is difficult to achieve hardware specifications with high display quality and balanced parameters.

In the following, a detailed analysis of the display scheme of TFT LCD will be carried out:

The display module of TFT LCD includes: light guide plate, lower polarizer, thin film transistor, liquid crystal layer, color filter plate and upper polarizer. TFT LCD uses a light guide plate to realize backlighting. After the backlight source is turned on, the light will be transmitted through the light guide plate and diffused into the display area of the display screen. Therefore, the entire display screen is either completely lit or completely extinguished. In order to avoid VR image display errors, it is necessary to turn on the backlight after the data in the entire display area is completely written and the liquid crystal layer is completely flipped. The backlighting methods of the light guide plate can be divided into direct-type and side-type. The direct-type means that the backlight source is placed on the back of the light guide plate, and the side-type means that the backlight source is placed on the side of the light guide plate.

Fig. 1 is a schematic diagram of a display module of a side-entry TFT LCD provided in an embodiment of the present application. As shown in Fig. 1, the display module includes: a light guide plate 101, a lower polarizer 102, a thin film transistor 103, and a liquid crystal layer 104 , a color filter plate 105 and an upper polarizer 106 . When the backlight source LED in the side direction is turned on, the light will pass through the light guide plate 101 and diffuse into the display area of the LCD. Because the backlight source LED can only realize the design of a unified switch, that is, either it is always on, and the entire LCD is completely lit. On, or always off, the entire LCD goes out completely.

Since the writing speed of the ITO (Indium Tin Oxides, indium tin oxide) capacitive switching signal of the liquid crystal layer 104 in the TFT LCD is limited by the line width of the ITO, that is, the refresh rate of the TFT LCD is limited. The liquid crystal molecules in the liquid crystal layer 104 reserve sufficient inversion time, which will inevitably shorten the time for writing data. The resolution of TFT LCD is limited, and it is impossible to achieve the dual specifications of refresh rate and resolution.

Fig. 2 is the schematic diagram of the driving mode of a kind of TFT LCD that the embodiment of the present application provides, as shown in 200 among Fig. 2, TFT LCD is divided into 5 screen areas A-E, for the 1st image frame, GPU (Graphics Processing Unit, image processor) sequentially writes the respective image data of the screen area A-E (that is, the pixel value of each pixel point) to the controller of the TFT LCD. For each screen area, once the writing is completed, the A corresponding first driving signal is applied to the pixel unit to control the liquid crystal molecules corresponding to the pixel unit to flip. Since the backlight source of TFT LCD can only be completely turned on or completely extinguished, after the liquid crystal molecules in the screen area A are flipped, it is necessary to enter the waiting stage, that is, to wait for the liquid crystal molecules in other screen areas B, C, D, and E. After all flipping is completed, the backlight can be turned on, that is, the first image frame is displayed on the TFT LCD. After a certain lighting time, the backlight source is turned off, and the GPU sequentially writes the image data of the second image frame in the screen area A-E to the TFT LCD controller, and performs a similar display driving process.

In view of this, the embodiment of the present application provides a method for driving a liquid crystal display, which can increase the resolution without compromising the refresh rate. On the basis of the structural framework of TFT LCD, replace the backlight source of TFT LCD with Mini LED, and adjust the driving mode of TFT LCD so that it can achieve higher resolution and brightness range. For VR usage scenarios, by making full use of the characteristics of Mini LEDs that can be switched locally, it is possible to implement backlight partition processing in the entire LCD screen. For each screen area, the backlight is turned on in time after the TFT layer completes signal writing and the LCD is completely flipped. , so that the LCD presents partial image content in the screen area, which can reduce the waiting time of each screen area before the backlight is turned on in the traditional driving mode. Furthermore, the waiting time reduced by the technical solution can be used to write more image data, or increase the lighting time of the backlight light source, thereby improving the resolution and brightness range of the LCD.

FIG. 3 is a schematic diagram of an implementation environment of a method for driving a liquid crystal display provided in an embodiment of the present application. Referring to FIG. 3 , the implementation environment includes an image processing device 310 and an electronic device 320 equipped with an LCD. The electronic device 320 may be a VR device supporting VR technology, or a traditional display device not supporting VR technology. The type of the electronic device 320 is not specifically limited. The image processing device 310 includes a GPU (Graphics Processing Unit, image processor) 311, and the electronic device 320 includes an LCD 321 and a controller 322 for the LCD.

The GPU 311 on the image processing device 310 is used to obtain the video stream to be played, the video stream includes continuous image frames and audio frames, and the image frames and audio frames at the same moment constitute the video frame at this moment. In an embodiment, the user selects a video to be played on the image processing device 310, and the image processing device 310 loads the video stream of the video to the GPU 311. In an embodiment, the video stream may be stored locally on the image processing device 310, or may be stored on a cloud server.

In an embodiment, the server may be an independent physical server, or a server cluster or a distributed system composed of multiple physical servers, or provide cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, Cloud servers for basic cloud computing services such as cloud communications, middleware services, domain name services, security services, CDN (Content Delivery Network, content distribution network), and big data and artificial intelligence platforms. The image processing device 310 and the server can be connected directly or indirectly through wired or wireless communication, which is not limited in this application.

The controller 322 of the LCD on the electronic device 320 is used to control the data communication between the GPU 311 and the LCD 321. During the display process, the GPU 311 will write continuous image frames to the controller 322, and the controller 322 receives each image frame. The image frame will drive the LCD 321 to display the image frame.

The LCD 321 on the electronic device 320 is a liquid crystal panel, which is controlled by the controller 322 to display corresponding image frames. In an embodiment, the LCD 321 can be divided into a plurality of screen areas, so as to display different parts of the image frame in units of screen areas. For example, the LCD 321 is divided into 5 equal-height screen areas according to the vertical position from top to bottom. After the image data of each screen area is written, the first driving signal is applied to control the pixel units in the screen area to correspond to each other. After the liquid crystal molecules in this screen area are flipped, the second driving signal is applied to control the part of the light sources corresponding to the pixel units in this screen area to light up, so that the screen area of LCD 321 displays the corresponding pixels in the image frame. Image section.

In an embodiment, the electronic device 320 may be a VR device, a smart phone, a tablet computer, a notebook computer, a desktop computer, a smart speaker, a smart watch, a vehicle terminal, an e-book reader, etc., but is not limited thereto.

In some embodiments, the image processing device 310 and the electronic device 320 can be integrated on the same physical machine, or the image processing device 310 and the electronic device 320 can be combined into an LCD display system through wired or wireless communication to realize the implementation of the present application. The LCD driving method provided by the example. In this embodiment of the present application, only the image processing device 310 and the electronic device 320 are integrated on the same physical machine as an example for illustration.

Those skilled in the art can know that the LCD 321 included in the electronic device 320 can generally refer to one of a plurality of LCDs, and the number of the above-mentioned LCD 321 can be more or less. For example, the above-mentioned LCD 321 can be only one, and the controller 322 Only drive a single LCD 321 to display image frames, or, the above-mentioned LCD 321 can be multiple, more than a dozen or dozens, or more quantities, and the controller 322 controls all LCDs 321 to display the same or different content (such as split screen display, multi-screen display), the embodiment of the present application does not limit the number of LCD 321 included in the electronic device 320.

Below, the core idea of the embodiment of the present application will be described:

FIG. 4 is a schematic diagram of the structure of a TFT LCD based on a Mini LED backlight source provided by an embodiment of the present application. As shown in Figure 4, the display module of TFT LCD based on Mini LED backlight source includes: backlight cover 401, Mini LED backlight source 402, lower polarizer 403, TFT 404, liquid crystal layer 405, RGB color filter plate 406, upper polarizer plate 407 and cover glass 408 . It can be seen that the LCD panel provided in the embodiment of the present application does not adopt the traditional backlight lighting method, that is, it does not belong to any of the traditional direct-type or side-type, but uses Mini LED to provide the backlight source. Mini LED can divide the LCD display screen into multiple screen areas, and can separately light up part of the light sources corresponding to a certain screen area, that is, it can light up the backlight light source in partitions. Moreover, TFT LCD and Mini LED can also realize the synchronization of driving signals, so as to ensure that the LCD panel and Mini LED can be synchronously driven by the LCD controller.

The above-mentioned TFT LCD based on the Mini LED backlight source, by adjusting the backlight source of the traditional TFT LCD to Mini LED, can light up the multiple screen areas divided by the Mini LED, and cooperate with the corresponding driving logic to realize the The improvement of the refresh rate, resolution, and brightness range parameter specifications of each screen area in electronic devices (such as VR devices), that is, the high resolution and high brightness range can be maintained under the premise of maintaining a high refresh rate, so that Greatly improve the experience of using VR devices.

FIG. 5 is a schematic diagram of an application scenario of a driving manner of a liquid crystal display provided in an embodiment of the present application. As shown in FIG. 5, taking the electronic device as a VR device as an example, when using the VR device to display VR images, an optical lens module 510, a TFT LCD display module 520 and a Mini LED backlight module 530 are required. The optical lens module 510 includes but is not limited to single lens or multi-lens, resin lens or glass lens, aspheric mirror, Fresnel lens or compound lens, etc. The type of the optical lens module 510 used by the VR device in the embodiment of this application is different. Make specific restrictions. The main display adopts TFT LCD display module 520, but abandons the traditional backlight method, and adopts Mini LED backlight module 530. Using the Mini LED backlight module 530, each screen area in the LCD can be individually lit to achieve the effect that different screen areas can be lit asynchronously, and with the display partition technology of the LCD, the image data of each screen area has been written. After that, the liquid crystal molecules flip over immediately. After the flipping of the liquid crystal molecules, there is no need to wait for all the liquid crystal molecules in other screen areas to flip over. Instead, you can first light up part of the light sources in the screen area of the backlight source, so that the LCD can display in this screen area. A portion of an image frame, allowing the user to see a partial image. This LCD driving method minimizes the time spent waiting for the liquid crystal molecules in other screen areas to flip. Although images are displayed sequentially in different screen areas, in the case of high refresh rate The inherent visual persistence characteristics of the human eye can ensure that the actual display effect observed by the human eye is not affected, and it brings a better image display experience.

FIG. 6 is a schematic diagram of a stacked structure of a TFT LCD based on a Mini LED backlight source provided by an embodiment of the present application. As shown in Figure 6, the TFT LCD based on the Mini LED backlight source includes a Mini LED backlight module 610, a lower polarizer 620, a TFT 630, a liquid crystal layer 640, a color filter 650 and an upper polarizer 660. Wherein, the Mini LED backlight module 610 includes a lower substrate 611, electrodes 612, RGB Mini LED 613, an upper substrate 614 and an anti-glare film 615. The controller of the LCD can drive the TFT 630 through the first driving signal, so as to control the liquid crystal molecules in the liquid crystal layer 640 to flip. The controller of the LCD can drive the RGB Mini LED 613 in the Mini LED backlight module 610 through the second driving signal, so as to light up the backlight light source of the RGB Mini LED 613.

FIG. 7 is a comparative schematic diagram of a backlight lighting method provided by an embodiment of the present application. As shown in FIG. 7 , part 701 shows a traditional backlight lighting method, and a direct-type backlight lighting method is taken as an example. It can be seen that in the traditional backlight lighting mode, the backlight panel is either fully lit or completely extinguished. Part 702 shows the Mini LED-based backlight lighting method provided by the embodiment of the present application. Since the Mini LED backlight light source can control different partitions to light up their own part of the light source, it can only target the part corresponding to the five-pointed star part in 702. The light sources need only be turned on, while the rest of the light sources can be turned off, so as to save energy and maintain a large contrast between the lit part and the non-lit part.

FIG. 8 is a flowchart of a method for driving a liquid crystal display provided by an embodiment of the present application. Referring to FIG. 8, this embodiment is applied to an electronic device equipped with a liquid crystal display LCD, and is executed by a controller of the LCD. In an embodiment, the electronic device may also be called a user device, a display device, a user terminal, a terminal device, a terminal, and the like. This embodiment includes the following steps 801-803:

801. The controller of the LCD determines driving voltages of pixel units in multiple screen areas of the LCD based on an image frame to be displayed.

In some embodiments, the electronic device may be a traditional LCD display device, such as a smartphone, a tablet computer, a notebook computer, a desktop computer, a smart speaker, a smart watch, a vehicle terminal, an e-book reader, etc., but not limited to this.

In some embodiments, the electronic device may be a virtual reality VR device, such as a VR helmet, VR glasses, etc., and the LCD is also a display component of the VR device. At this time, the image frame to be displayed may be a VR image frame, wherein , VR refers to a three-dimensional computer-generated virtual environment that immerses users in it and isolates it from the real environment.

In some embodiments, the electronic device can also be a mixed reality (Mixed Reality, MR) device, such as MR helmet, MR glasses, etc., and the LCD is also the display component of the MR device, and the image frame to be displayed can be is the MR image frame. Among them, MR refers to mixing the real environment and the virtual environment through holograms, and can also be regarded as a mixture of VR and AR (Augmented Reality, Augmented Reality).

In some embodiments, the controller of the LCD on the electronic device receives the image frame to be displayed sent by the GPU of the electronic device, and the image frame can be any frame in the continuous image frames in the video stream, or a single images that are not part of the video stream to be displayed. In an embodiment, the video stream may be a traditional video stream, a VR video stream, an MR video stream, etc. Similarly, the corresponding image frame may be a traditional image frame, a VR image frame, an MR image frame, etc. This is not specifically limited.

In some embodiments, when determining the driving voltages of the pixel units in a plurality of screen regions according to the image frame to be displayed, since the image frame received by the controller of the LCD refers to the pixel value of each pixel point in the image frame, and the image Each pixel in the frame corresponds to a pixel unit in a screen area of the LCD, so the driving voltage of each pixel unit can be used to drive the liquid crystal molecules in the corresponding LCD liquid crystal layer to flip, so that the light can pass through each layer of the LCD After that, the color indicated by the pixel value of the corresponding pixel point can be presented.

In an embodiment, the LCD involved in the embodiment of the present application may be an LCD that supports partitions for backlighting. Therefore, for any one of the multiple screen regions divided by the LCD, each pixel in the screen region is determined When the driving voltage of the unit is used, the controller of the LCD can determine the pixel value of each pixel unit in the screen area corresponding to each pixel point in the image frame, and then, for any pixel unit in the screen area, the controller of the LCD is based on The pixel value of the pixel point corresponding to the pixel unit determines the target inversion angle of the liquid crystal molecules corresponding to the pixel unit, and determines the driving voltage required to invert the liquid crystal molecules to the target inversion angle.

In the above process, since the pixel units on the LCD correspond to the pixel points in the image frame, each screen area divided on the LCD can correspond to an image area in the image frame, and each screen area in the image area The pixel value of a pixel determines the driving voltage of each pixel unit in the screen area. To make the liquid crystal molecules in the pixel unit display the pixel value of the corresponding pixel point, the liquid crystal molecules need to flip to the target flip angle, and the driving voltage is positive. is the voltage value required to flip the liquid crystal molecules to the target flip angle. Through the above method, the screen area on the LCD can be precisely controlled to display the content of the corresponding image area in the image frame, and the display accuracy of the LCD can be improved.

802. For any screen area among the multiple screen areas, the controller of the LCD outputs a first drive signal to the pixel units in the screen area based on the determined drive voltage, and the first drive signal is used to control the pixel units in the screen area. The liquid crystal molecules corresponding to the pixel units are flipped under the driving voltage.

In some embodiments, when the controller of the LCD outputs the first drive signal to the pixel units in multiple screen areas, it can respectively drive different screen areas in a certain order, that is to say, the LCD controller For multiple screen areas of the LCD, determine the priority of each screen area, and based on the order of priority from high to low, perform the step of outputting the first drive signal to the pixel units in the screen area based on the determined drive voltage .

In the above process, by determining the driving order of different screen areas according to different priorities, the screen areas can be driven in an orderly manner and light up after flipping, and the driving order of each screen area is controllable, greatly improving The controllability and operability of the LCD driving method. By setting different priorities for different screen areas, or setting the priority determination strategy of the screen area, the precise positioning of the priority of each screen area can be achieved. Several different priority determination strategies will be introduced below.

In a possible implementation manner, the controller of the LCD may determine the priority of each screen area based on the location information of the multiple screen areas in the LCD. For example, the controller of the LCD determines the highest priority for the uppermost screen area in the vertical direction and the lowest priority for the lowermost screen area in the vertical direction in order from top to bottom. For another example, the LCD controller determines the highest priority for the leftmost screen area in the horizontal direction and the lowest priority for the rightmost screen area in the horizontal direction in order from left to right. The embodiment of the application does not specifically limit the relationship between the location information and the priority.

In the above process, according to the position information of the screen area, the driving sequence of the screen area is arranged according to the position, such as sequentially driving from top to bottom, or sequentially driving from left to right, etc., so that each screen area in the LCD The driving sequence of the LCD is ordered according to the position, which improves the display effect of the LCD.

In a possible implementation manner, for any screen area among the plurality of divided screen areas on the LCD, the controller of the LCD obtains the pixel value of each pixel unit in the screen area corresponding to each pixel point in the image frame; The priority of the screen area is determined based on the average value of the pixel values of each pixel point, wherein the priority of the screen area is positively correlated with the average value of the pixel values.

In the above process, since each screen area in the LCD corresponds to an image area in the image frame, for any screen area, the average value of the pixel values of each pixel in the corresponding image area can be obtained. The average value represents the amount of information contained in the entire image area, so the priority can be set to be positively correlated with the average value of the pixel value to control the screen area containing more information to be driven preferentially to further improve the LCD display Effect.

In a possible implementation manner, for any screen area among the plurality of divided screen areas on the LCD, the controller of the LCD determines the pixel value of each pixel unit in the screen area corresponding to each pixel point in the image frame; Determine the target pixel value of each pixel unit corresponding to each pixel point in the previous frame of the image frame in the screen area; obtain the pixel change value between the pixel value of each pixel point and the target pixel value; based on the pixel value of each pixel point The average value of the change value determines the priority of the screen area, wherein the priority of the screen area is positively correlated with the average value of the pixel change value.

In the above process, since each screen area in the LCD corresponds to an image area in the image frame, for any screen area, it is possible to obtain the pixel points in the corresponding image area of this image frame compared with the pixels of the previous frame The average value of the change value, because the average value of the pixel change value represents the change degree of the entire image area compared with the previous frame, so it can be controlled by setting the priority to be positively correlated with the average value of the pixel change value. The screen area with a greater degree of change in the frame is preferentially driven to further improve the display effect of the LCD.

803. In response to the completion of outputting the first driving signal to the pixel units in the screen area and reaching the target duration, the controller of the LCD outputs a second driving signal to the backlight source of the LCD, and the second driving signal is used to control the screen area The corresponding part of the light source lights up.

In some embodiments, for each screen area of the LCD, the controller of the LCD does not turn on the backlight (that is, outputs the second drive signal) after outputting the first driving signal at a target time interval, this is to wait for the screen area The liquid crystal molecules corresponding to the inner pixel unit are completely inverted. Therefore, the target duration can be set as the time required for the liquid crystal molecules corresponding to the pixel units in the current screen area to completely flip. Since the thin film transistor TFT applies voltage to the liquid crystal molecules in the liquid crystal layer through the charging and discharging of the ITO capacitor, the process of applying the first driving signal is to charge the ITO capacitor, and the voltage between the two poles of the ITO capacitor is maintained as the corresponding pixel The driving voltage of the unit, so that the liquid crystal molecules can be controlled to flip under the action of the driving voltage. Therefore, after the output of the first drive signal of any screen area is completed and reaches the target duration, the controller of the LCD can output the second drive signal to the backlight source of the LCD to control the part of the light sources corresponding to the screen area in the backlight source to light up. , to achieve the effect of lighting up the entire backlight light source in partitions.

In some embodiments, when the controller of the LCD outputs the second driving signal, the circuit corresponding to the screen area can be determined in the backlight circuit of the backlight light source; through the second driving signal, the circuit is controlled to conduct, so that Turn on the part of the light source. In the above process, by setting different loops for different screen areas, when controlling the conduction of a single loop corresponding to the screen area, other loops can be kept closed, so that only part of the light sources in the entire backlight can be turned on, achieving The effect of partitioning and lighting the screen area.

In the above process, for each screen area, once the LCD controller determines the driving voltage of each pixel unit in the screen area, it immediately outputs the first drive signal to each pixel unit in the screen area, thereby controlling the pixel units in the screen area. The liquid crystal molecules corresponding to each pixel unit are flipped. After the liquid crystal molecules corresponding to this screen area are turned over, there is no need to wait for the liquid crystal molecules corresponding to other screen areas in the LCD to be turned over, but can directly control the conduction of the circuit corresponding to this screen area in the backlight circuit, so that only the Part of the light sources corresponding to this screen area greatly saves the waiting time for each screen area to flip the liquid crystal molecules.

In some embodiments, in the scenario where the LCD plays video streams, the GPU writes multiple consecutive image frames to the LCD controller, and the LCD controller receives the multiple consecutive image frames written by the GPU. The embodiment of the present application only takes a single image frame as an example for illustration. For the next image frame of the image frame, the controller of the LCD can receive the next frame of the image frame; based on the driving method involved in the embodiment of the application, determine The drive voltages of the pixel units in the plurality of screen areas of the LCD, based on the determined drive voltage, sequentially input the first drive signal to the pixel units in the plurality of screen areas of the LCD, for any of the plurality of screen areas A screen area, in response to the completion of outputting the first driving signal to the pixel units in the screen area and reaching the target duration, outputting the second driving signal to the backlight light source of the LCD, and so on, so as to partition a plurality of consecutive image frames Light up and display on the LCD, so I won't go into details here.

All the above-mentioned technical solutions can be combined in any way to form the embodiments of the present disclosure, which will not be repeated here.

In the method provided by the embodiment of the present application, by dividing the LCD into multiple screen areas, and outputting the first driving signal to each pixel unit in each screen area, after the liquid crystal molecules in this screen area are flipped, there is no need to wait for other screen areas The liquid crystal molecules in the area have all flipped over, but directly output the second driving signal to the backlight source to control the lighting of some light sources corresponding to this screen area, thus saving the waiting time of each screen area in the LCD during the backlighting process. The saved waiting time can be used for the LCD controller to receive a larger amount of data to write, thus greatly improving the LCD resolution without compromising the LCD refresh rate.

FIG. 9 is an interactive flowchart of a method for driving a liquid crystal display provided in an embodiment of the present application. As shown in Figure 9, the driving method of the liquid crystal display LCD is applied to an electronic device equipped with a liquid crystal display LCD. In an embodiment, the electronic device can also be called a user device, a display device, a user terminal, a terminal device, a terminal Wait. This embodiment includes the following steps 901-909:

901. The GPU of the electronic device writes an image frame to be displayed to the controller of the LCD of the electronic device.

In some embodiments, the electronic device may also be an MR device, such as an MR helmet, MR glasses, etc., and the LCD is also a display component of the MR device. At this time, the image frame to be displayed may be an MR image frame, wherein, MR refers to the mixing of the real environment and the virtual environment through holograms, and it can also be regarded as a mixture of VR and AR.

In some embodiments, the GPU of the electronic device receives the image frame to be displayed sent by the CPU, and sends the image frame to be displayed to the controller of the LCD. The image frame can be any of the continuous image frames in the video stream. A frame can also be a separate image to be displayed that does not belong to the video stream. In an embodiment, the video stream may be a traditional video stream, a VR video stream, an MR video stream, etc. Similarly, the corresponding image frame may be a traditional image frame, a VR image frame, an MR image frame, etc. This is not specifically limited.

902. For any one screen area among the plurality of screen areas of the LCD, the controller of the LCD determines the pixel value of each pixel unit in the screen area corresponding to each pixel point in the image frame.

In some embodiments, since the LCD involved in the embodiment of the present application can be an LCD that supports partitions for backlighting, therefore, for any one of the multiple screen regions divided by the LCD, the controller of the LCD can determine the Each pixel unit in the screen area corresponds to the pixel value of each pixel point in the image frame. In an embodiment, the controller of the LCD queries the screen coordinate corresponding to the pixel for each pixel in the image frame according to the mapping relationship between the pixel and the screen coordinate, and the pixel unit corresponding to the screen coordinate is The pixel unit corresponding to the pixel point performs the above operation on each pixel point, and the pixel unit corresponding to each pixel point can be obtained. Then, for each screen area, the pixel unit corresponding to each pixel unit in the screen area can be obtained. The pixel value of each pixel point of .

903. For any pixel unit in the screen area, the controller of the LCD determines the target flip angle of the liquid crystal molecules corresponding to the pixel unit based on the pixel value of the pixel point corresponding to the pixel unit.

In some embodiments, for each pixel unit, the controller of the LCD can determine the target flip angle of a liquid crystal molecule according to the optical principle according to the pixel value of the corresponding pixel point, so that after the light passes through each layer of the LCD, the pixel unit The color indicated by the pixel value of the corresponding pixel point can be presented.

904. The controller of the LCD determines the driving voltage required to flip the liquid crystal molecules to the target flip angle.

In some embodiments, since the LCD includes a liquid crystal layer, there are TFT gates and source electrodes at both ends of the liquid crystal layer, and the voltage difference between the gate electrode and the source electrode can control the liquid crystal molecules to flip. In this method, the sources of all liquid crystal molecules in the liquid crystal layer are set to the same value (that is, the source is shared, which can be regarded as grounding), so that only the voltage difference required for liquid crystal molecule flipping needs to be determined according to the target flip angle, and the voltage difference and The shared voltage of the source determines the driving voltage of the gate.

In the above steps 902-904, the controller of the LCD determines the driving voltage of the pixel units in each screen area of the LCD based on the image frame to be displayed, because the pixel units on the LCD have a corresponding relationship with the pixel points in the image frame , so each screen area divided on the LCD can correspond to an image area in the image frame. The pixel value of each pixel in the image area determines the driving voltage of each pixel unit in the screen area. To make the pixel unit If the liquid crystal molecules inside display the pixel value of the corresponding pixel point, the liquid crystal molecules need to be flipped to the target flip angle, and the driving voltage is exactly the voltage value required to flip the liquid crystal molecules to the target flip angle. Through the above method, the screen area on the LCD can be precisely controlled to display the content of the corresponding image area in the image frame, and the display accuracy of the LCD can be improved.

905. For multiple screen areas of the LCD, the controller of the LCD determines the priority of each screen area.

In a possible implementation manner, for any screen area among the plurality of divided screen areas on the LCD, the controller of the LCD obtains the pixel value corresponding to each pixel point of each pixel unit in the screen area in the image frame; The priority of the screen area is determined based on the average value of the pixel values of each pixel point, wherein the priority of the screen area is positively correlated with the average value of the pixel values.

906. The controller of the LCD outputs a first drive signal to the pixel units in the corresponding screen area based on the order of priority from high to low and based on the determined drive voltage, and the first drive signal is used to control the pixels in the screen area The liquid crystal molecules corresponding to the cells are flipped under the driving voltage.

In some embodiments, after the priority of each screen area is determined, for the pixel unit in the screen area with the highest priority, the corresponding first driving signal is generated based on the determined driving voltage, and output to the pixel unit The first driving signal, then, perform the above operation on the screen area with the second highest priority, and so on, until the above operation is performed on all screen areas, thereby completing the driving and flipping of all liquid crystal molecules in the entire LCD screen .

In the above process, by determining the driving order of different screen areas according to different priorities, the screen areas can be driven in an orderly manner and light up after flipping, and the driving order of each screen area is controllable, greatly improving The controllability and operability of the LCD driving method. By setting different priorities for different screen areas, or setting the priority determination strategies of the screen areas, the precise positioning of the priorities of each screen area can be achieved. Several different priority determination strategies will be introduced below.

907. In response to the completion of output of the first drive signal of any screen area and reaching the target duration, the controller of the LCD determines a loop corresponding to the screen area in the backlight circuit of the backlight light source.

In some embodiments, for each screen area of the LCD, the controller of the LCD does not turn on the backlight (that is, outputs the second drive signal) after outputting the first driving signal at a target time interval, this is to wait for the screen area The liquid crystal molecules corresponding to the inner pixel unit are completely inverted. Since the thin film transistor TFT applies voltage to the liquid crystal molecules in the liquid crystal layer through the charging and discharging of the ITO capacitor, the process of applying the first driving signal is to charge the ITO capacitor, and the voltage between the two poles of the ITO capacitor is maintained as the corresponding pixel The driving voltage of the unit, so that the liquid crystal molecules can be controlled to flip under the action of the driving voltage. Therefore, in all screen areas of the LCD, when the first drive signal output of any screen area is completed and reaches the target duration, the controller of the LCD can determine the loop corresponding to the screen area in the backlight circuit of the backlight source. .

In some embodiments, the controller of the LCD can determine the loop corresponding to the screen area according to the mapping relationship between the screen area and the loop. For example, the mapping relationship can be the position correspondence between the screen area and the loop, or it can also be The preset corresponding relationship is not specifically limited in this embodiment of the present application.

908. The controller of the LCD controls the turn-on of the loop through the second driving signal to turn on the part of the light sources corresponding to the screen area, and the second driving signal is used to control the part of the light sources corresponding to the screen area to turn on.

In some embodiments, the controller of the LCD can set the switch of the loop to an on state, so as to conduct the loop, so as to charge the IPO capacitor corresponding to each pixel unit. It should be noted that since the voltage difference between the gate and the source can be kept constant after the charging of the IPO capacitor is completed, it is not necessary to open the switch of the loop all the time, but to open the switch of the loop and wait for the charging of the IPO capacitor to be completed. Finally, close the circuit switch to save energy.

In the above process, by setting different loops for different screen areas, when controlling the conduction of a single loop corresponding to the screen area, other loops can be kept closed, so that only part of the light sources in the entire backlight can be turned on, achieving The effect of partitioning and lighting the screen area.

In the above steps 907-908, in response to the completion of the output of the first driving signal of any screen area and reaching the target duration, the controller of the LCD may output the second driving signal to the backlight source of the LCD. That is to say, for each screen area, once the LCD controller determines the driving voltage of each pixel unit in the screen area, it immediately outputs the first drive signal to each pixel unit in the screen area, thereby controlling the pixel units in the screen area. The liquid crystal molecules corresponding to each pixel unit are flipped. After the liquid crystal molecules corresponding to this screen area are turned over, there is no need to wait for the liquid crystal molecules corresponding to other screen areas in the LCD to be turned over, but can directly control the conduction of the circuit corresponding to this screen area in the backlight circuit, so that only the Part of the light sources corresponding to this screen area greatly saves the waiting time for each screen area to flip the liquid crystal molecules.

909. The LCD of the electronic device displays image data corresponding to the image frame in each screen area.

In some embodiments, each screen area in the LCD will display the corresponding image area in the image frame in the current screen area (i.e. Image data), although this will cause different image areas in the image frame to be displayed sequentially, but using the persistence of vision characteristics of the human eye, as long as the display time difference of each image area does not exceed the threshold that the human eye can perceive, it will It can ensure that the visual presentation effect of the image frame is not affected.

In some embodiments, in the scenario where the LCD plays video streams, the GPU writes multiple consecutive image frames to the LCD controller, and the LCD controller receives the multiple consecutive image frames written by the GPU. The embodiment of the present application only takes a single image frame as an example for illustration. For the next frame of the image frame, the controller of the LCD can receive the next image frame of the image frame; based on the driving method involved in the embodiment of the present application, determine The driving voltages of the pixel units in the plurality of screen areas of the LCD, based on the determined driving voltage, sequentially input the first driving signal to the pixel units in the plurality of screen areas of the LCD, for any of the plurality of screen areas A screen area, in response to the completion of outputting the first driving signal to the pixel units in the screen area and reaching the target duration, outputting the second driving signal to the backlight source of the LCD. In other words, for the next frame, operations similar to the above steps 901-909 are performed, and so on, so that multiple consecutive image frames are partitioned and displayed on the LCD, which will not be repeated here.

FIG. 10 is a schematic diagram of a partitioning method of an LCD provided by an embodiment of the present application. As shown in Figure 10, the Mini LED backlight panel of the LCD is divided into 5 areas 1001-1005, and these 5 areas are arranged from left to right in turn, and the LCD controller can control these 5 areas through the second driving signal Light up in different time periods. In an embodiment, if these five regions are regarded as a unified part, then the entire LCD panel can be uniformly turned on simultaneously. The lower part 1010 in FIG. 10 shows the graph of the time axis and the brightness change of each area. According to the sequence from left to right, the areas 1001-1005 are respectively lit up. It can be seen from the figure that the area 1001 -1005 can achieve the effect of asynchronous lighting.

FIG. 11 is a logical schematic diagram of a backlight circuit provided by an embodiment of the present application. As shown at 1100 in Figure 11, on the basis of dividing the Mini LED backlight panel into five areas 1001-1005 as shown in Figure 10, correspondingly, five loops are provided in the entire backlight circuit for Control whether to turn on some of the light sources of the backlight corresponding to the regions 1001-1005.

FIG. 12 is a schematic diagram of a partitioning method of an LCD provided by an embodiment of the present application. As shown in Figure 12, the Mini LED backlight panel of the LCD is divided into 25 areas 1201-1225, and these 25 areas are arranged in 5 rows and 5 columns from left to right and from top to bottom. The second driving signal controls the 25 regions to light up in different time periods. In the embodiment, if these 25 areas are regarded as a unified part, then the entire LCD panel can be uniformly illuminated at the same time, of course, multiple areas in these 25 areas can also be regarded as a combined part , so as to uniformly light up multiple regions, for example, the

regions

1201, 1207, 1213, 1219, and 1225 are regarded as a combined part, and the

regions

1201, 1207, 1213, 1219, and 1225 are uniformly lit or turned off. Compared with the method of dividing into 5 regions provided in FIG. 10 , the method of dividing into 25 regions provided in FIG. 12 can further improve the refined display requirement of LCD partition lighting. Dividing into 25 areas is just an example of the division method of the Mini LED backlight panel. More or fewer areas can be divided according to the actual display requirements, as long as each area can be guaranteed to support partial lighting in sequence. In the embodiment of the present application, the waiting time for waiting for the rest of the liquid crystal molecules to flip after the image signal is written can be reduced by means of local lighting, so that the saved time can be used to write a larger amount of data, so that Provide higher resolution while maintaining a certain refresh rate. In addition, the saved waiting time can also be used to increase the lighting time of the backlight panel, so that the LCD can display a higher brightness value and brightness range, and further improve the display effect of the LCD.

FIG. 13 is a logical schematic diagram of a backlight circuit provided by an embodiment of the present application. As shown at 1300 in Figure 13, on the basis of dividing the Mini LED backlight panel into 25 areas 1201-1225 as shown in Figure 12, correspondingly, 25 circuits are provided in the entire backlight circuit for Control whether to turn on some of the light sources corresponding to the areas 1201-1225 in the backlight light source.

FIG. 14 is a principle comparison diagram of an LCD driving method provided by an embodiment of the present application. As shown in FIG. 14 , taking a screen refresh rate of 90 Hz (Hertz) as an example, the duration of each image frame is 11 ms (milliseconds), and each grid represents 1 ms. In the traditional backlight lighting method shown in 1401, take the LCD divided into 5 screen areas as an example. After writing image data and flipping the liquid crystal molecules in each screen area, it needs to wait for the liquid crystal molecules in other screen areas to flip. After completion, all screen areas of the entire LCD can be uniformly lit, and then the writing phase of the next frame of image data is started. The Mini LED-based backlight lighting method provided by the embodiment of the application shown in 1402 takes the LCD divided into 10 screen areas as an example. After each screen area is written with image data and liquid crystal molecules are flipped, the screen Areas are individually lit, while other screen areas are still off, so it will not affect the writing of image data and flipping of liquid crystal molecules in other screen areas, thereby saving the waiting time of each screen area.

FIG. 15 is a schematic diagram of a display effect of an LCD driving method provided by an embodiment of the present application. As shown in Figure 15, when the LCD displays an image frame, it actually first displays the image content of area 1501, and then sequentially displays the respective image content of

areas

1502, 1503, 1504, and 1505. Human eyes cannot detect that the image frames are displayed successively in different regions, so that the display effect of the LCD will not be affected.

FIG. 16 is a schematic diagram of the principle of an LCD driving method provided by an embodiment of the present application. As shown at 1600 in Figure 16, after the image data in each screen area is written, it immediately enters the flipping stage of the liquid crystal molecules in this screen area, and immediately enters the backlight lighting of this screen area after the liquid crystal molecules flip. stages, so that the backlighting of each screen area is performed asynchronously, and there is no need to wait for the liquid crystal molecules in other screen areas to flip and then light up uniformly. The traditional backlight lighting method based on the light guide plate can only be turned on uniformly. Therefore, when the image data in all screen areas of the entire LCD is not completely written, and the liquid crystal molecules in all screen areas are not completely flipped, the backlight The light source cannot be turned on, otherwise the complete image content of this frame of image cannot be presented. However, when using the LCD based on the Mini LED backlight source provided by the embodiment of the present application, when displaying image frames, due to the use of the persistence of vision characteristics of the human eye, the image data is written in a local area and the liquid crystal molecules are completely flipped. , the local area can be lighted to realize the partial presentation of the image. Although image data writing and liquid crystal flipping occur sequentially, as long as the duration of image data writing and sequential liquid crystal flipping does not exceed the threshold that can be detected by the human eye, the presentation effect of the image frame will not be damaged. Therefore, the technical solution provided by the embodiment of the present application can maximize the image display of each core program, maximize the use of the image refresh interval, and improve the parameter specification of the TFT LCD.

FIG. 17 is another schematic diagram of an LCD driving method provided by an embodiment of the present application. As shown at 1700 in Figure 17, the GPU outputs a plurality of consecutive image frames to the controller of the LCD, and the controller of the LCD receives the plurality of image frames, and writes the image data of a plurality of screen areas respectively for the first frame of image data enter. It should be noted that the writing process involved in the embodiment of the present application includes: determining the driving voltage of each pixel unit according to the pixel value of each pixel point, and then, after the image data of each screen area is written, for each The liquid crystal molecules in the screen area are turned over, and after the liquid crystal molecules in each screen area are turned over, part of the light sources in the backlight light sources of each screen area are turned on. For the first frame of image, after multiple screen areas are lighted up, although the multiple screen areas present image content sequentially, a complete first frame of image can be synthesized by using the persistence of vision feature. After multiple screen areas in the first frame of image are written, start writing the second frame of image, and perform similar operations on the second frame of image, which will not be repeated here.

Fig. 18 is a schematic diagram of a Mini LED backlight panel provided by an embodiment of the present application. As shown at 1800 in Figure 18, each pixel unit in the Mini LED backlight panel can correspond to a separate partial backlight source, so that the same screen area can be individually lit without affecting the backlight source in other screen areas. Therefore, the limitation that the whole light guide plate needs to be uniformly lit is broken. In the writing cycle of the entire image frame, the time can be allocated to data writing, so that there is a steady stream of image data written into the LCD controller throughout the image display stage, and the screen area where the image data is written first goes first. The liquid crystal is flipped over and the backlight is turned on first. In the case of a high refresh rate, the partial lighting of multiple screen areas will appear as a complete image due to the persistence of the viewing angle of the human eye, which will not affect the display of the LCD. Effect. Since the length of the refresh interval can be fully utilized, the GPU can write more image data to the LCD controller without changing the existing process and material characteristics, thereby meeting the demand for higher resolution. In addition, the waiting time saved by this method can also be used to increase the lighting time when the entire image frame is displayed, or to increase the refresh rate when the resolution is maintained, so as to reserve a margin for subsequent LCD applications , to facilitate the improvement of its subsequent parameter specifications.

In an exemplary embodiment, a display device with a liquid crystal display is provided, the device includes: an optical lens module, a display module of a liquid crystal display LCD, a Mini LED backlight module of the LCD, and the LCD driver chip.

The structural relationship between the optical lens module, the display module and the Mini LED backlight module is shown in Figure 5. The Mini LED backlight module is used to provide the backlight source for the display module, while the display module refers to the The "screen" of the LCD, while the optical lens module is used to refract the light emitted by the LCD.

The module structure of the display module can be shown in FIG. 6 , which includes, from top to bottom, an upper polarizer, a color filter, a liquid crystal layer, a TFT, and a lower polarizer. Both the upper polarizer and the lower polarizer are used to polarize and filter the light. The color filter is used to filter the white light emitted by the light source into red, green and blue colored light. The liquid crystal layer contains liquid crystal molecules, and the TFT is used for The liquid crystal molecules are controlled to flip through the driving voltage.

The module structure of the Mini LED backlight module can also be shown in Figure 6, including from top to bottom: anti-glare film, upper substrate, RGB Mini LED, electrodes and lower substrate. The anti-glare film is used to prevent glare, and glare is a bad lighting phenomenon. The upper substrate and the lower substrate are the main substrate structure of the Mini LED, and the RGB Mini LED is used to provide a backlight source for the display module. The electrodes are used for Determine the switch state of each loop in the RGB Mini LED and the voltage in the loop when it is turned on.

The driving chip is used for: determining the driving voltage of the pixel units in multiple screen areas of the LCD based on the image frame to be displayed; for any screen area in the multiple screen areas, based on the determined driving voltage, to the The pixel units in the screen area output a first driving signal, and the first driving signal is used to control the liquid crystal molecules corresponding to the pixel units in the screen area to flip under the driving voltage; in response to the output to the pixel units in the screen area After the first driving signal is completed and reaches the target duration, a second driving signal is output to the Mini LED backlight module, and the second driving signal is used to control the lighting of some light sources corresponding to the screen area.

The device provided by the embodiment of the present application divides the LCD into multiple screen areas and outputs the first drive signal to each screen area to control the flipping of the liquid crystal molecules in this screen area without waiting for the liquid crystal molecules in other screen areas. The molecules are flipped over, but directly output the second driving signal to the backlight light source to control the lighting of some light sources corresponding to the screen area, thereby saving the waiting time of each screen area in the LCD during the backlight lighting process, and the saved The waiting time can be used for the LCD controller to receive a larger amount of data to write, thus greatly improving the LCD resolution without compromising the LCD refresh rate.

In a possible implementation manner, the driver chip is used for:

For multiple screen areas of the LCD, determine the priority of each screen area;

The step of outputting the first driving signal to the pixel units in the screen area based on the determined driving voltage is performed based on the priority order from high to low.

In a possible implementation manner, the driver chip is used for:

Based on the position information of multiple screen areas in the LCD, the priority of each screen area is determined.

In a possible implementation manner, the driver chip is used for:

For any screen area, obtain the pixel value corresponding to each pixel point of each pixel unit in the screen area in the image frame;

The priority of the screen area is determined based on the average value of the pixel values of each pixel point, wherein the priority of the screen area is positively correlated with the average value of the pixel values.

In a possible implementation manner, the driver chip is used for:

For any screen area, determine the pixel value of each pixel unit in the screen area corresponding to each pixel point in the image frame;

Determine the target pixel value corresponding to each pixel point of each pixel unit in the screen area in the previous frame of the image frame;

Obtain the pixel change value between the pixel value of each pixel point and the target pixel value;

The priority of the screen area is determined based on the average value of the pixel change values of each pixel, wherein the priority of the screen area is positively correlated with the average value of the pixel change values.

In a possible implementation manner, the driver chip is used for:

For any one of the pixel units, based on the pixel value of the pixel point corresponding to the pixel unit, determine the target flip angle of the liquid crystal molecules corresponding to the pixel unit;

The driving voltage required to flip the liquid crystal molecules to the target flip angle is determined.

In a possible implementation manner, the driver chip is used for:

In the backlight circuit of the backlight light source, determine the circuit corresponding to the screen area;

Through the second driving signal, the loop is controlled to be turned on, so as to light up the part of the light source.

In a possible implementation manner, the driver chip is used for:

receiving the next image frame of the image frame;

determining the driving voltages of the pixel units in the plurality of screen areas of the LCD, and sequentially inputting first driving signals to the pixel units in the plurality of screen areas of the LCD based on the determined driving voltages, and for the pixel units in the plurality of screen areas For any screen area, in response to the completion of outputting the first driving signal to the pixel units in the screen area and reaching the target duration, outputting the second driving signal to the backlight source of the LCD.

In a possible implementation manner, the LCD is a display component of a virtual reality VR device, and the image frame is a VR image frame.

Fig. 19 is a schematic structural diagram of a driving device for a liquid crystal display provided in an embodiment of the present application. As shown in Fig. 19, the device includes:

A determination module 1901, configured to determine the driving voltage of the pixel units in multiple screen areas of the LCD based on the image frame to be displayed;

The first output module 1902 is configured to output a first driving signal to the pixel units in the screen area based on the determined driving voltage for any screen area in the plurality of screen areas, the first driving signal is used to control the screen The liquid crystal molecules corresponding to the pixel units in the area are flipped under the driving voltage;

The second output module 1903 is configured to output a second driving signal to the backlight source of the LCD in response to the completion of outputting the first driving signal to the pixel units in the screen area and reaching the target duration, and the second driving signal is used to control the Some of the light sources corresponding to the screen area are turned on.

In a possible implementation manner, based on the composition of the apparatus in FIG. 19 , the first output module 1902 includes:

The determination unit is used to determine the priority of each screen area for the plurality of screen areas of the LCD; based on the order of priority from high to low, perform output based on the determined driving voltage to the pixel units in the screen area. A step of driving a signal.

In a possible implementation manner, the determining unit is used for:

In a possible implementation manner, the determination module 1901 is used to:

For any pixel unit, based on the pixel value of the pixel point corresponding to the pixel unit, determine the target flip angle of the liquid crystal molecule corresponding to the pixel unit;

In a possible implementation manner, the second output module 1903 is used to:

In a possible implementation manner, based on the composition of the device in Figure 19, the device further includes:

The receiving module is used to receive the next image frame of the image frame; determine the driving voltage of the pixel units in the plurality of screen areas of the LCD, and based on the determined driving voltage, sequentially send to the pixels in the plurality of screen areas of the LCD The unit inputs the first drive signal, and for any one of the multiple screen areas, in response to the completion of outputting the first drive signal to the pixel units in the screen area and reaching the target duration, output to the backlight source of the LCD Second drive signal.

It should be noted that: when the driving device of the liquid crystal display provided by the above-mentioned embodiment drives the liquid crystal display LCD, the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned functions can be allocated according to needs. The functional modules are completed, that is, the internal structure of the electronic device is divided into different functional modules to complete all or part of the functions described above. In addition, the liquid crystal display driving device and the liquid crystal display driving method embodiment provided in the above embodiments belong to the same idea, and the specific implementation process thereof is detailed in the liquid crystal display driving method embodiment, which will not be repeated here.

FIG. 20 is a schematic structural diagram of an electronic device provided by an embodiment of the present application. As shown in FIG. 20 , the electronic device is a VR device 2000 as an example for illustration. In an embodiment, the device type of the VR device 2000 includes: a VR helmet, VR glasses, and the like. The VR device 2000 includes one or more LCDs 2010 and one or more controllers 2020 of the LCD. In an embodiment, any controller 2020 of the LCD may be a microcontroller integrated with the LCD liquid crystal panel.

In some embodiments, the VR device 2000 may also include an LCD driver chip 2030, and the driver chip 2030 and the controller 2020 may constitute an LCD driver circuit, or the controller 2020 may also be regarded as an integrated part of the driver chip 2030 components, so that the drive chip 2030 alone provides the drive circuit of the LCD.

In the driver chip 2030, it may include: an address decoder 2031 connected to the row electrodes of the LCD liquid crystal panel, a source driver 2032 connected to the column electrodes of the LCD liquid crystal panel, and the address decoder 2031 and the source driver 2032 can respectively communicate with the controller 2020.

The controller 2020 is configured to load and execute the liquid crystal display driving methods provided by the above-mentioned embodiments. That is to say, the controller 2020 determines the driving voltage of the pixel units in each screen area of the LCD based on the image frame to be displayed; for any screen area, based on the determined driving voltage, it outputs The first drive signal, the first drive signal is used to control the liquid crystal molecules corresponding to the pixel units in the screen area to flip under the drive voltage; in response to the output of any one of the first drive signals in the screen area is completed and reaches the target duration , outputting a second driving signal to the backlight light source of the LCD, where the second driving signal is used to control part of the light sources corresponding to the screen area to turn on.

The address decoder 2031 is configured to apply corresponding driving voltages to the row electrodes of the liquid crystal molecules according to the first driving signal output by the controller 2020, so as to gate the row addresses of the liquid crystal molecules. For example, the first driving signal may be a sequence composed of a series of driving voltages, each of which corresponds to a pixel unit of a row in the LCD panel.

The source driver 2032 is used to drive the liquid crystal molecules to flip according to the first drive signal output by the controller 2020. In an embodiment, each pixel unit in the same row is set with the same source voltage, so that the row of the selected liquid crystal molecules address, it is only necessary to change the row electrodes of each pixel unit in the row.

In some embodiments, the driver chip 2030 can also include: a data interface unit 2033, a register and an instruction control unit 2034 (Register And Instruction Control), a gate timing controller 2035 (Gate Timing Control), a source driving timing controller 2036 (Source Driver Timing Control), backlight driver 2037, image parameter generator 2038 (Gamma Generator), etc.

Data interface unit 2033 can be connected with controller 2020, register and instruction control unit 2034 respectively; Register and instruction control unit 2034 is connected with gate timing controller 2035, source electrode driving timing controller 2036, backlight driver 2037 and image parameter generator 2038 is connected; the gate timing controller 2035 is connected with the address decoder 2031; the source driving timing controller 2036 and the image parameter generator 2038 are respectively connected with the source driver 2032; the backlight driver 2037 is connected with the backlight.

In an embodiment, the data interface unit 2033 includes a system interface (System I/F) and a data latch (Data Latch). The data interface unit 2033 is used to receive and latch the driving signal (eg, the first driving signal, the second driving signal) sent by the controller 2020 , and send the received driving signal to the register and instruction control unit 2034 . In an embodiment, the system interface may be a Mobile Industry Processor Interface (MIPI).

The register and instruction control unit 2034 includes a register and instruction controller. The register is used to store the driving signal sent by the data interface unit 2033, and the instruction controller is used to control the sending of the driving signal. The instruction controller can send the first driving signal to the gate timing controller 2035 , the source driving timing controller 2036 and the image parameter generator 2038 , and can also send the second driving signal to the backlight driver 2037 .

The gate timing controller 2035 generates row start signals, row clock pulse signals, row voltage signal sequences, etc. according to the first driving signal, and sends them to corresponding input ports of the address decoder 2031 . The address decoder 2031 receives the row start signal, the row clock pulse signal, and the row voltage signal sequence of the gate timing controller 2035, and under the action of the row clock pulse signal, translates the row voltage signal sequence into a gate voltage signal (that is, driving voltage), and apply the gate voltage signal to the corresponding row electrode to gate the corresponding row address.

The source driving timing controller 2036 generates a column enable signal, a column clock pulse signal, a column control signal, etc. according to the first driving signal, and sends the generated signal to the source driver 2032 . The image parameter generator 2038 generates gray scale voltages according to the first driving signal through an internal resistor divider network, and sends the gray scale voltages to the source driver 2032 .

The source driver 2032 converts the column control signal into a voltage signal for applying to the column electrode according to the received column enable signal, column clock pulse signal, column control signal and gray scale voltage, and uses the gray scale voltage as a reference, and Under the action of the column clock pulse signal, a voltage signal is applied to the column electrodes to drive the liquid crystal molecules to flip.

The backlight source driver 2037 is configured to control part of the light sources corresponding to each screen area in the LCD to turn on according to the second drive signal output by the controller 2020 . For example, the backlight driver 2037 performs analog-to-digital conversion and power amplification on the received second drive signal, and then sends it to the Mini LED backlight, and then controls the part of the light sources in the Mini LED backlight corresponding to the screen area that needs to be lit currently to turn on. , and control the part of the light source to turn off after the continuous lighting time.

Those skilled in the art can understand that the structure shown in FIG. 20 does not constitute a limitation to the VR device 2000, and may include more or less components than shown in the figure, or combine some components, or adopt a different component arrangement.

Fig. 21 is a schematic structural diagram of an electronic device provided by an embodiment of the present application. The electronic device 2100 may have relatively large differences due to different configurations or performances. The electronic device 2100 includes one or more than one LCD 2101, one or more LCDs. More than one controller 2102 and one or more memory 2103, wherein at least one computer program is stored in the memory 2103, and the at least one computer program is loaded and executed by the one or more controller 2102 to realize the above-mentioned various embodiments The driving method of the LCD display is provided. In an embodiment, the electronic device 2100 also has components such as a wired or wireless network interface, a keyboard, and an input and output interface for input and output, and the electronic device 2100 also includes other components for realizing device functions, which will not be repeated here. . In an embodiment, the electronic device 2100 may be a VR device, and at this time, the LCD is a display component of the VR device. Of course, the electronic device 2100 may also be a non-VR device, which is not specifically limited in this embodiment of the present application.

In an exemplary embodiment, a driver chip of a liquid crystal display is also provided, the driver chip includes one or more controllers and one or more memories, and at least one computer program is stored in the one or more memories , the at least one computer program is loaded and executed by the one or more controllers to implement the method for driving the liquid crystal display provided by the above-mentioned embodiments.

In an exemplary embodiment, there is also provided a computer-readable storage medium, such as a memory including at least one computer program, the above-mentioned at least one computer program can be executed by the controller of the LCD in the electronic device to complete the liquid crystal in the above-mentioned various embodiments How to drive the display. For example, the computer-readable storage medium includes ROM (Read-Only Memory, read-only memory), RAM (Random-Access Memory, random-access memory), CD-ROM (Compact Disc Read-Only Memory, read-only disc), Magnetic tapes, floppy disks, and optical data storage devices, etc.

In an exemplary embodiment, there is also provided a computer program product or computer program comprising one or more pieces of program code stored in a computer readable storage medium. One or more controllers of the LCD in the electronic device can read the one or more program codes from the computer-readable storage medium, and the one or more controllers execute the one or more program codes, so that the electronic device can execute In order to complete the driving method of the liquid crystal display in the above embodiment.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above embodiments can be completed by hardware, and can also be completed by instructing related hardware through a program. In an embodiment, the program is stored in a computer-readable storage medium. , in an embodiment, the storage medium mentioned above is a read-only memory, a magnetic disk or an optical disk, and the like.

The above is only an embodiment of the application, and is not intended to limit the application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the application shall be included in the protection scope of the application. Inside.

Claims

A kind of driving method of liquid crystal display screen, is carried out by the controller of liquid crystal display screen LCD, described method comprises:

determining driving voltages of pixel units in a plurality of screen areas of the LCD based on an image frame to be displayed;

For any screen area among the plurality of screen areas, based on the determined drive voltage, a first drive signal is output to the pixel units in the screen area, and the first drive signal is used to control the The liquid crystal molecules corresponding to the pixel units are flipped under the driving voltage;

In response to the completion of outputting the first drive signal to the pixel units in the screen area and reaching the target duration, a second drive signal is output to the backlight source of the LCD, and the second drive signal is used to control the pixel unit corresponding to the screen area. Part of the light source lights up.
The method according to claim 1, wherein, for any screen area among the plurality of screen areas, outputting the first driving signal to the pixel units in the screen area based on the determined driving voltage comprises:

For multiple screen areas of the LCD, determining the priority of each screen area;

The step of outputting the first driving signal to the pixel units in the screen area based on the determined driving voltage is performed based on the order of priority from high to low.
The method according to claim 2, wherein, for the plurality of screen areas of the LCD, determining the priority of each screen area comprises:

Based on the position information of the plurality of screen areas in the LCD, the priority of each screen area is determined.
The method according to claim 2, wherein, for the plurality of screen areas of the LCD, determining the priority of each screen area comprises:

For any screen area, obtain the pixel value corresponding to each pixel point of each pixel unit in the screen area in the image frame;

The priority of the screen area is determined based on the average value of the pixel values of each pixel, wherein the priority of the screen area is positively correlated with the average value of the pixel values.
The method according to claim 2, wherein, for the plurality of screen areas of the LCD, determining the priority of each screen area comprises:

For any screen area, determine the pixel value corresponding to each pixel point of each pixel unit in the screen area in the image frame;

Determine the target pixel value corresponding to each pixel point of each pixel unit in the screen area in the previous frame of the image frame;

Obtain the pixel change value between the pixel value of each pixel point and the target pixel value;

The priority of the screen area is determined based on the average value of the pixel change value of each pixel point, wherein the priority of the screen area is positively correlated with the average value of the pixel change value.
The method according to claim 1, wherein said determining the driving voltages of the pixel units in the plurality of screen areas of the LCD based on the image frame to be displayed comprises:

For any screen area, determine the pixel value corresponding to each pixel point of each pixel unit in the screen area in the image frame;

For any one of the pixel units, based on the pixel value of the pixel point corresponding to the pixel unit, determine the target flip angle of the liquid crystal molecules corresponding to the pixel unit;

The driving voltage required to flip the liquid crystal molecules to the target flip angle is determined.
The method according to claim 1, wherein said outputting the second driving signal to the backlight light source of the LCD comprises:

In the backlight circuit of the backlight light source, determine a circuit corresponding to the screen area;

Through the second driving signal, the loop is controlled to be turned on, so as to light up the part of the light sources.
The method according to claim 1, wherein the method further comprises:

receiving a next image frame of the image frame;

determining the driving voltages of the pixel units in the plurality of screen areas of the LCD, and sequentially inputting first driving signals to the pixel units in the plurality of screen areas of the LCD based on the determined driving voltages, for the plurality of screen areas In any one of the screen areas, in response to the completion of outputting the first driving signal to the pixel units in the screen area and reaching the target duration, the second driving signal is output to the backlight source of the LCD.
The method according to claim 1, wherein the LCD is a display component of a virtual reality (VR) device, and the image frame is a VR image frame.
A display device with a liquid crystal display, comprising: a display module of a liquid crystal display LCD, a Mini LED backlight module of the LCD and a driver chip of the LCD, wherein the display module includes a liquid crystal Molecule, the Mini LED backlight module includes red, green and blue RGB Mini LEDs, and the RGB Mini LEDs are used to provide a backlight source for the display module;

The driving chip is used to: determine the driving voltage of the pixel units in the multiple screen areas of the LCD based on the image frame to be displayed; for any screen area in the multiple screen areas, based on the determined driving voltage , outputting a first driving signal to the pixel units in the screen area, the first driving signal is used to control the liquid crystal molecules corresponding to the pixel units in the screen area to flip under the driving voltage; The pixel units in the screen area output the first driving signal and reach the target duration, and output the second driving signal to the Mini LED backlight module, and the second driving signal is used to control the corresponding part of the screen area The light source turns on.
The device according to claim 10, wherein the driver chip is used for:

For multiple screen areas of the LCD, determining the priority of each screen area;

The step of outputting the first driving signal to the pixel units in the screen area based on the determined driving voltage is performed based on the order of priority from high to low.
The device according to claim 11, wherein the driver chip is used for:

Based on the position information of the plurality of screen areas in the LCD, the priority of each screen area is determined.
An electronic device, the electronic device includes a liquid crystal display LCD, one or more controllers of the LCD, and one or more memories, at least one computer program is stored in the one or more memories, and the at least A computer program is loaded and executed by the one or more controllers to realize the driving method of the liquid crystal display according to any one of claims 1 to 9.
A driver chip for a liquid crystal display, the driver chip includes one or more controllers and one or more memories, at least one computer program is stored in the one or more memories, and the at least one computer program is controlled by the The one or more controllers are loaded and executed to realize the driving method of the liquid crystal display according to any one of claims 1 to 9.
A computer-readable storage medium, at least one computer program is stored in the storage medium, and the at least one computer program is loaded and executed by the controller of the liquid crystal display screen to realize any one of claims 1 to 9 The driving method of the liquid crystal display described above.
A computer program product, including one or more program codes, the one or more program codes are stored in a computer-readable storage medium, and one or more controllers of a liquid crystal display LCD in an electronic device can be accessed from the computer Reading the one or more program codes from the storage medium, and executing the one or more program codes, so that the electronic device executes the liquid crystal display according to any one of claims 1 to 9 drive method.